Cooler For Transformer Using Generation Cycle

Abstract

The present invention relates to a cooler for a transformer using a generation cycle to eliminate the heat applied to the transformer. The insulation oil heated in the transformer gasifies the refrigerant in the refrigerant boiler and the insulation oil is cooled by the latent heat of evaporation of the refrigerant. The gasified refrigerant exhausts out the heat in the condenser and it becomes liquefied. The liquefied refrigerant returns to the refrigerant boiler by the refrigerant feeding pump or by gravity. The present invention is very effective with respect to operating cost and reliability.

Description

TECHNICAL FIELD[0001]The present invention relates to the cooler for transformer. The heat applied to the transformer is divided into 2 components. The first is the heat applied from outside of the transformer and the second is the heat of winding loss and core loss that comes in operation of the transformer. These heats give an influence to the temperature of the insulation oil and give an impact to the performance of the winding insulation. And it becomes a key factor of the decision of the capacity and the lifetime of the transformer. We have eliminated the heat applied to the transformer by the cooling methods of ONAN (Natural oil, Natural air cooling), OFAF (Forced oil, Forced air cooling), OFWF (Forced oil, Forced water cooling) and etc. The present invention adopts the generation cycle for the cooling method of the transformer newly.BACKGROUND ART[0002]Some people include I have invented the cooler for the transformer using refrigeration cycle. The refrigeration cycle has the...

AI Technical Summary

Benefits of technology

[0009]FIG. 5 illustrates the cooler using the generation cycle only the refrigerant boiler and the condenser are installed. It is similar to the FIG. 4 but different that the refrigerant feeding pump 18 that the check valve 19 is installed in parallel is omitted. In this case the liquefied refrigerant from the condenser 16 goes to the refrigerant boiler 13 and a cycle of the cooling transformer is finished. The structure of the cooler becomes very simple.

Problems solved by technology

To adopt the refrigeration cycle that can makes the temperature of the insulation oil be lower than that of the atmosphere in the cooling of the transformer causes over-cooling and increases the probability of the trouble in operation.

In the case of the heat-pipe to maintain the vacuum is very difficult and the small pipe type facilities can not cool the large transformer.

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